“The European Guidelines for Self Compacting Concrete” represent a state of the art document addressed to those specifiers, designers, purchasers , producers and users who wish to enhance their expertise and use of SCC.
The Guidelines have been prepared using the wide range of the experience and knowledge available to the European Project Group. The proposed specifications and related test methods for ready-mixed and site mixed concrete, are presented in a pre-normative format, intend to facilitate standardisation at European level. This approach should encourage increased acceptance and utilisation of SCC.
“The European Guidelines for Self Compacting Concrete” define SCC and many of the technical terms used to describe its properties and use. They also provide information on standards related to testing and to associated constituent materials used in the production of SCC.
Durability and other engineering properties of hardened concrete are covered to provide reassurance to designers on compliance of SCC with EN 1992-1-1 Design of concrete structures (Eurocode 2).
The Guidelines cover information that is common to SCC for the ready-mixed, site mixed and the precast concrete industry. Chapter 12 is devoted to the specific requirements of precast concrete products.
The document describes the properties of SCC in its fresh and hardened state, and gives advice to the purchaser of ready-mixed and site mixed concrete on how SCC should be specified in relation to the current European standard for structural concrete, EN 206-1. It also describes the test methods used to support this specification. The appended specification and test methods are presented in a pre-normative format that mirrors current EN concrete standards.
Advice is given to the producer on constituent materials, their control and interaction. Because there are a number of different approaches to the design of SCC mixes, no specific method is recommended, but a comprehensive list of papers describing different methods of mix design is provided.
Advice is given to the contractor/user of ready-mixed and site mixed concrete on delivery and placing. Whilst accepting that SCC is a product used by both the precast and in-situ industries, the Guidelines attempt to give specific advice related to the differing requirements of the two sectors. For example, early setting and early strength are important to precasters, whereas workability retention may be more important in in-situ applications.
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Posted by: datagap - 01-21-2011, 12:24 AM - Forum: Concrete
- No Replies
Casting of Self Compacting Concrete
Author: Edited by Å. Skarendahl and Peter Billberg | Size: 1.5 MB | Format:PDF | Publisher: RILEM Publications S.A.R.L. | Year: 2006 | pages: 41 | ISBN: 235158001X; 2912143985
Increased productivity and improved working environment have had high priority in the development of concrete construction over the last decade. Development of a material not needing vibration for compaction - i.e. self-compacting concrete, SCC – has successfully met the challenge and is now increasingly being used in routine practice.
The key to the improvement of fresh concrete performance has been nanoscale tailoring of molecules for surface active admixtures, as well as improved understanding of particle packing and of the role of mineral surfaces in cementitious matrixes. Fundamental studies of rheological behaviour of cementitious particle suspensions were soon expanded to extensive innovation programs incorporating applied research, site experiments, instrumented full scale applications, supporting technology, standards and guides, information efforts as well as training programs.
The major impact of the introduction of self-compacting concrete is connected to the production process. The choice and handling of constituents are modified as well as mix design, batching, mixing and transporting. The productivity is drastically improved through elimination of vibration compaction and process reorganisation. The working environment is significantly enhanced through avoidance of vibration induced damages, reduced noise and improved safety. Additionally, the technology is improving performance in terms of hardened material properties like surface quality, strength and durability.
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hi
any one have this book
tabellenbuch bautechnik by Peter Peschel
this is german book but in English Very usfull book
Produktinformation
* Verlag: Handwerk Und Technik
* 2010
* 20., aktualis. u. verb. Aufl.
* Ausstattung/Bilder: 208 S. m. meist farb. Abb.
* Seitenzahl: 208
* Best.Nr. des Verlages: 3590
The use of fibre optic sensors in structural health monitoring has rapidly accelerated in recent years. By embedding fibre optic sensors in structures (e.g. buildings, bridges and pipelines) it is possible to obtain real time data on structural changes such as stress or strain. Engineers use monitoring data to detect deviations from a structure’s original design performance in order to optimise the operation, repair and maintenance of a structure over time.
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Dear ALL
Really , this is a very good demonstration about the Design of Water Structures
I will let you to evaluate it by yourself
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Simulated earthquake motions compatible with prescribed response spectra
Vanmarcke, Erik H.; Gasparini, Dario A.
PDF|RAR 6.57|6.27 MB
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Seismic Design, Response Modification and Retrofit of Bridges
Author: Kazuhiko Kawashima | Size: 13 MB | Format:PDF | Publisher: Tokyo Institute of Technology | Year: 2010 | pages: 332
Seismic Design, Response Modification and Retrofit of Bridges
This is a lecture note for “Seismic Design, Response Modification and Retrofit of Bridges” at the Graduate Course of the Department of Civil Engineering, Tokyo Institute of Technology, Japan. The scientific and engineering knowledge on the earthquake engineering is described in this note with an emphasis on the application to bridges. Since the contents includes a broad senses on the structural engineering, the structural dynamics, the concrete engineering, the soil mechanics, foundation engineering, the engineering seismology, and the construction engineering, students are required to take those courses before studying this class.
Bridges are unique structures in their structural responses compared to other structures. They are longitudinally lengthy. There are various types of superstructures, substructures, and foundations as shown in Figs. P-1, P-2, P-3, and P-4 (Road Maintenance Technology Center 1996), with complex geometries and dynamic response characteristics. However, bridges have a lower degree of static indeterminacy than buildings. Hence failure of a part of structural element such as columns or foundations likely results in a collapse of the entire bridge system. Effect of the soil-structure interaction and the spatial variation of ground motions are significant in bridges than buildings. Since bridges are a vital component of transportation system, bridges should have sufficient seismic safety in an earthquake.
The 1989 Loma Prieta, the 1994 Northridge, the 1995 Kobe, the 1999 Taiwan and the Turkey earthquakes caused significant damage to bridges and these events together with the research triggered as a consequence of past earthquakes has led to significant advances in seismic engineering of bridges.
This lecture note shows the recent technologies for seismic design, seismic response modification, and seismic retrofit of bridges. Past seismic damage of bridges, characterizations of ground motion, dynamic response analysis methods, seismic response characteristics of bridges, and strength and ductility of reinforced concrete columns are also described.
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Author: ISE | Size: 31 MB | Format:PDF | Publisher: The Institution of Structural Engineers | Year: 1999 | pages: 168 | ISBN: 1874266514
Glass remains an elusive material for engineers, feared because it is brittle, under-used because design data is so hard to find.
This is especially vexatious because it is a material much sought after by architects. It is hard to think of any modern building in which glass does not play an important part.
Transparency and translucency are essential features of modern architecture.
There are many books and many precedents that inspire designers to use glass but the data designers need is not easy to find. It exists but it is not available from a single source.
This guide attempts to assemble the information that structural engineers will need.
In doing so it touches on many issues that influence design but which are not necessarily themselves structural, for example condensation, colour and acoustical behaviour.
The guide is aimed at two distinct groups of users.
- Those who want straightforward advice on how to do something in glass with guidance on the applicability of the designs or details that are offered.
- Those who want to design in glass from first principles.
As far as possible the guide compares and contrasts the structural behaviour of glass with that of other, better-known, structural materials.
Whilst primarily aimed at structural engineers the guide will be of interest to a wide variety of professionals within the construction industry.
The report was part-funded by the Department of the Environment, Transport and the Regions under the Partners in Technology programme.
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